1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 59c8772ee4ee..dae740adaf65 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -1743,6 +1743,7 @@ static int make_request(request_queue_t *q, struct bio * bi)
         sector_t logical_sector, last_sector;
         struct stripe_head *sh;
         const int rw = bio_data_dir(bi);
+        int remaining;
 
         if (unlikely(bio_barrier(bi))) {
                 bio_endio(bi, bi->bi_size, -EOPNOTSUPP);
@@ -1852,7 +1853,9 @@ static int make_request(request_queue_t *q, struct bio * bi)
                         
         }
         spin_lock_irq(&conf->device_lock);
-        if (--bi->bi_phys_segments == 0) {
+        remaining = --bi->bi_phys_segments;
+        spin_unlock_irq(&conf->device_lock);
+        if (remaining == 0) {
                 int bytes = bi->bi_size;
 
                 if ( bio_data_dir(bi) == WRITE )
@@ -1860,7 +1863,6 @@ static int make_request(request_queue_t *q, struct bio * bi)
                 bi->bi_size = 0;
                 bi->bi_end_io(bi, bytes, 0);
         }
-        spin_unlock_irq(&conf->device_lock);
         return 0;
 }